This 'How-to' Guide makes an important contribution by providing practical tools and resources for an investing community that urgently needs to address its diversity and inclusion deficits. Globally, awareness of gender lens investing continues to gain momentum, but stakeholders must convert this awareness to action and movement of capital, especially true at the time of writing, during the Covid-19 pandemic. Thus, how fund managers invest is just as important as what they invest in. This perspective not only demands a technical approach (gender analysis, tools, and frameworks), but also broader organizational re-alignment, via gender mainstreaming). This internal process is an essential part of creating external change and outcomes that advance gender equality.